Answer / mathanvel

These are techniques involved in the Black Box Testing to
Derive the Test Cases
Now, we can reduce some of the test cases that belong to the
same equivalence class. We can delete lines 3 and 4 which
belong to equivalence class "0 <= account <= 499". We also
can delete lines 7 and 8 hich belong to "500 <= account <=
1000". The new table will be:

#

Boundary Value

Equivalence Class

Result
1
-1 account < 0 Invalid
2
0 0 <= account <= 499 Valid
5
499 0 <= account <= 499 Valid
6
500 500 <= account <= 1000 Valid
9 1000 500 <= account <= 1000 Valid
10 1001 1000 < account < 2000 Invalid
11 1999 1000 < account < 2000 Invalid
12 2000 2000 <= account <= 2000 Valid
13 2001 account > 2000 Invalid

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